21013434410 has 16 divisors (see below), whose sum is σ = 37885298400. Its totient is φ = 8391792336.

The previous prime is 21013434361. The next prime is 21013434419. The reversal of 21013434410 is 1443431012.

It is not an unprimeable number, because it can be changed into a prime (21013434419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1691180 + ... + 1703559.

It is an arithmetic number, because the mean of its divisors is an integer number (2367831150).

Almost surely, 2^21013434410 is an apocalyptic number.

21013434410 is a deficient number, since it is larger than the sum of its proper divisors (16871863990).

21013434410 is a wasteful number, since it uses less digits than its factorization.

21013434410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395365.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21013434410 its reverse (1443431012), we get a palindrome (22456865422).

The spelling of 21013434410 in words is "twenty-one billion, thirteen million, four hundred thirty-four thousand, four hundred ten".